/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Machine specific IO port address definition for generic. * Written by Osamu Tomita <tomita@cinet.co.jp> */ #ifndef __LINUX_I8253_H #define __LINUX_I8253_H #include <linux/param.h> #include <linux/spinlock.h> #include <linux/timex.h> /* i8253A PIT registers */ #define PIT_MODE 0x43 #define PIT_CH0 0x40 #define PIT_CH2 0x42 #define PIT_LATCH ((PIT_TICK_RATE + HZ/2) / HZ) extern raw_spinlock_t i8253_lock; extern bool i8253_clear_counter_on_shutdown; extern struct clock_event_device i8253_clockevent; extern void clockevent_i8253_init(bool oneshot); extern void setup_pit_timer(void); #endif /* __LINUX_I8253_H */